Pen-based computer



FIG. 1 is a top perspective view of a pen based computer showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is the top plan view thereof;

FIG. 4 is the right side elevation view thereof;

FIG. 5 is the rear elevation view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is the left side elevation view thereof; and,

FIG. 8 is the front elevation view thereof.

The circular elements are partially shown in FIG. 6 for ease of illustration and they are understood to continue uniformly across the indicated surface. 

The ornamental design for the pen-based computer, as shown and described. 